package com.tduck.cloud.api.aspect;

import cn.hutool.core.util.ObjectUtil;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.tduck.cloud.account.util.JwtUtils;
import com.tduck.cloud.api.annotation.Log;
import com.tduck.cloud.api.enums.HttpMethod;
import com.tduck.cloud.api.util.HttpUtils;
import com.tduck.cloud.common.util.ServletUtils;
import com.tduck.cloud.form.entity.OperLog;
import com.tduck.cloud.form.service.OperLogService;
import org.apache.commons.lang3.StringUtils;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.validation.BindingResult;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.servlet.HandlerMapping;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.lang.reflect.Method;
import java.util.*;

/**
 * @author zhaoling
 * @date 2023年05月04日 14:32
 */
@Aspect
@Component
public class LogAspect {

    private static final Logger logger = LoggerFactory.getLogger(LogAspect.class);

    @Autowired
    private OperLogService operLogService;

    private final JwtUtils jwtUtils;

    public LogAspect(JwtUtils jwtUtils) {
        this.jwtUtils = jwtUtils;
    }

    @Pointcut("@annotation(com.tduck.cloud.api.annotation.Log)")
    public void logPointCut() {
    }


    /**
     * 处理完请求后执行
     *
     * @param joinPoint 切点
     */
    @AfterReturning(pointcut = "logPointCut()", returning = "jsonResult")
    public void doAfterReturning(JoinPoint joinPoint, Object jsonResult) {
        handleLog(joinPoint, null, jsonResult);
    }

    /**
     * 拦截异常操作
     *
     * @param joinPoint 切点
     * @param e         异常
     */
    @AfterThrowing(value = "logPointCut()", throwing = "e")
    public void doAfterThrowing(JoinPoint joinPoint, Exception e) {
        handleLog(joinPoint, e, null);
    }

    protected void handleLog(JoinPoint joinPoint, Exception e, Object jsonResult) {
        Log controllerLog;
        try {
            controllerLog = getAnnotationLog(joinPoint);
            if (controllerLog == null) {
                return;
            }
            OperLog operLog = new OperLog();
//            MethodSignature signature = (MethodSignature) joinPoint.getSignature();
//            Method method = signature.getMethod();
//            Log log = method.getAnnotation(Log.class);
//            if (log != null) {
//                //获取注解中的模块和操作名称
//                String operation = log.operation();
//                operLog.setOperation(operation);
//            }

            if (e != null) {
                operLog.setErrorMsg(StringUtils.substring(e.getMessage(), 0, 2000));
            }
            //获取方法名
            String className = joinPoint.getTarget().getClass().getName();
            String methodName = joinPoint.getSignature().getName();
            operLog.setMethod(className + "." + methodName + "()");

            //String params = argsArrayToString(joinPoint.getArgs());
//            JSONObject jsonObject = JSONObject.parseObject(params);
//            //获取操作人
//            Integer operatorId = (Integer) jsonObject.get("operatorId");
//            operLog.setOperatorId(operatorId);
            //获取方法参数
            //operLog.setParams(StringUtils.substring(params, 0, 2000));

            //获取返回值
            operLog.setResult(StringUtils.substring(JSON.toJSONString(jsonResult), 0, 5000));

            // ip
            operLog.setOperIp(HttpUtils.getIpAddr(ServletUtils.getRequest()));

            //url
            operLog.setOperUrl(ServletUtils.getRequest().getRequestURI());

            // 请求方式
            operLog.setRequestMethod(ServletUtils.getRequest().getMethod());
            // 处理设置注解上的参数
            getControllerMethodDescription(joinPoint, controllerLog, operLog);
            //保存日志信息
            operLogService.save(operLog);
        } catch (Exception exception) {
            exception.printStackTrace();
        }

    }

    /**
     * 是否存在注解，如果存在就获取
     */
    private Log getAnnotationLog(JoinPoint joinPoint) throws Exception {
        Signature signature = joinPoint.getSignature();
        MethodSignature methodSignature = (MethodSignature) signature;
        Method method = methodSignature.getMethod();
        if (method != null) {
            return method.getAnnotation(Log.class);
        }
        return null;
    }

    /**
     * 获取注解中对方法的描述信息 用于Controller层注解
     *
     * @param log 日志
     * @param operLog 操作日志
     * @throws Exception
     */
    public void getControllerMethodDescription(JoinPoint joinPoint, Log log, OperLog operLog) throws Exception
    {
        // 设置标题
        operLog.setOperation(log.operation());
        // 是否需要保存request，参数和值
        if (log.isSaveRequestData())
        {
            // 获取参数的信息，传入到数据库中。
            setRequestValue(joinPoint, operLog);
        }
    }

    /**
     * 获取请求的参数，放到log中
     *
     * @param operLog 操作日志
     * @throws Exception 异常
     */
    private void setRequestValue(JoinPoint joinPoint, OperLog operLog) throws Exception
    {
        String requestMethod = operLog.getRequestMethod();
        if (HttpMethod.PUT.name().equals(requestMethod) || HttpMethod.POST.name().equals(requestMethod))
        {
            String params = argsArrayToString(joinPoint.getArgs());
            operLog.setParams(StringUtils.substring(params, 0, 2000));
        }
        else
        {
            Map<?, ?> paramsMap = (Map<?, ?>) ServletUtils.getRequest().getAttribute(HandlerMapping.URI_TEMPLATE_VARIABLES_ATTRIBUTE);
            operLog.setParams(StringUtils.substring(ServletUtils.getRequest().getQueryString(), 0, 2000));
        }
    }

    /**
     * 参数拼装
     */
    private String argsArrayToString(Object[] paramsArray) {
        String params = "";
        if (paramsArray != null && paramsArray.length > 0) {
            for (int i = 0; i < paramsArray.length; i++) {
                if (ObjectUtil.isNotNull(paramsArray[i]) && !isFilterObject(paramsArray[i])) {
                    Object jsonObj = JSON.toJSON(paramsArray[i]);
                    params += jsonObj.toString() + " ";
                }
            }
        }
        return params.trim();
    }

    /**
     * 判断是否需要过滤的对象。
     *
     * @param o 对象信息。
     * @return 如果是需要过滤的对象，则返回true；否则返回false。
     */
    @SuppressWarnings("rawtypes")
    public boolean isFilterObject(final Object o) {
        Class<?> clazz = o.getClass();
        if (clazz.isArray()) {
            return clazz.getComponentType().isAssignableFrom(MultipartFile.class);
        } else if (Collection.class.isAssignableFrom(clazz)) {
            Collection collection = (Collection) o;
            for (Iterator iter = collection.iterator(); iter.hasNext(); ) {
                return iter.next() instanceof MultipartFile;
            }
        } else if (Map.class.isAssignableFrom(clazz)) {
            Map map = (Map) o;
            for (Iterator iter = map.entrySet().iterator(); iter.hasNext(); ) {
                Map.Entry entry = (Map.Entry) iter.next();
                return entry.getValue() instanceof MultipartFile;
            }
        }
        return o instanceof MultipartFile || o instanceof HttpServletRequest || o instanceof HttpServletResponse
                || o instanceof BindingResult;
    }
}
